Pressure Intensifier for Fluids

Abstract

A pressure intensifier for fluids, in particular for liquids, comprising a cylinder block in which a pressure intensifier piston and a control piston move cyclically, wherein the pressure intensifier piston forms a high-pressure working chamber and a low-pressure working chamber in the cylinder block and the cylinder block has a low-pressure connection for feeding in low-pressure fluid from outside, a high-pressure connection for discharging higher-pressure working fluid towards the outside and a connection for discharging fluid whose working capacity in the pressure intensifier is exhausted, wherein the cylinder block has a coupling portion rigidly connected with it, which can be inserted into a receiving bore of a hydraulic block and fixed there, so that the receiving bore encloses the coupling portion, wherein the coupling portion has at least two fluid transfer regions fluidically separated by a seal, for exchanging fluid between the pressure intensifier and the hydraulic block into which it is inserted.

1 . A pressure intensifier for liquids comprising:
 a cylinder block in which a pressure intensifier piston and a control piston move cyclically, wherein the pressure intensifier piston forms a high-pressure working chamber and a low-pressure working chamber in the cylinder block and the cylinder block has a low-pressure connection for feeding in low-pressure fluid from outside;   a high-pressure connection for discharging higher-pressure working fluid towards the outside and a connection for discharging fluid whose working capacity in the pressure intensifier is exhausted;   the cylinder block having a coupling portion rigidly connected with said cylinder block, said coupling portion can be inserted into a receiving bore of a hydraulic block and fixed there, so that the receiving bore encloses the coupling portion, wherein the coupling portion has at least two fluid transfer regions fluidically separated by a seal, for exchanging fluid between the pressure intensifier and the hydraulic block into which it is inserted.   
     
     
         2 . The pressure intensifier of  claim 1 , wherein coming from inside the cylinder block a channel, via which the pressure intensifier discharges fluid in operation whose working capacity is exhausted, leads into a fluid transfer region and that a further channel, via which low-pressure fluid is fed into the pressure intensifier leads into another fluid transfer region. 
     
     
         3 . The pressure intensifier of  claim 1  wherein the coupling portion has a third fluid transfer region for transferring the higher-pressure working fluid to the hydraulic block. 
     
     
         4 . The pressure intensifier of  claim 1  wherein at least one of the fluid transfer regions comprises a peripheral annular groove. 
     
     
         5 . The pressure intensifier of  claim 1  wherein at least one channel leads into the end face (entire end or end surface of an annular shoulder) of the coupling portion ideally the channel via which the higher-pressure working fluid is discharged by the pressure intensifier. 
     
     
         6 . The pressure intensifier of  claim 1  wherein the coupling portion has a thread for screwing the coupling portion into a hydraulic block. 
     
     
         7 . The pressure intensifier of  claim 7  wherein the fluid transfer regions (are disposed between the free end of the coupling portion ( 100 ) to be inserted into the hydraulic block ( 100 ) and the thread ( 102 ) of the coupling portion. 
     
     
         8 . The pressure intensifier of  claim 1  wherein the cylinder block of the pressure intensifier has a molded-on hexagon. 
     
     
         9 . The pressure intensifier of  claim 1  wherein at least two bores extending parallel to the longitudinal axis (L) of the pressure intensifier run through coupling portion, which extend from the free end face of the coupling portion into the area of the cylinder block, which is always positioned outside the hydraulic block accommodating the coupling portion. 
     
     
         10 . The pressure intensifier ( 1 ) according to  claim 9 , wherein the end leading into the free end face of the coupling portion is sealed by a plug at least one of the bores, and that this bore intersects a cross bore that leads into a fluid transfer region. 
     
     
         11 . A hydraulic unit comprising a hydraulic block in which several bores, through which hydraulic fluid flows, for connecting different hydraulic operative units are formed, and at least one pressure intensifier of  claim 1  wherein the pressure intensifier has a coupling portion inserted into a bore in the hydraulic block. 
     
     
         12 . The hydraulic unit according to  claim 11 , wherein the hydraulic unit comprises several pressure intensifiers each of which has a coupling portion inserted into a bore of the hydraulic block. 
     
     
         13 . The hydraulic unit according to  claim 12 , wherein at least two, better at least three, pressure intensifiers are connected in series one behind the other, so that the high pressure provided by a pressure intensifier preceding in the flow direction constitutes the pressure with which a subsequent pressure intensifier in the flow direction is supplied on the input side.